Spliced display screen and spliced display module

Abstract

The invention relates to a spliced display screen and a spliced display module, the spliced display screen comprises a display main body, the display main body comprises a plurality of display panels arranged in an array splicing mode, in the horizontal sight line direction, the display main body comprises a first area and a second area with different visual angles, the first area comprises at least one first display panel, and the second area comprises at least one second display panel. The second area comprises at least one second display panel, the first display panel comprises a first light-emitting device, and the second display panel comprises a second light-emitting device; the first light-emitting device and the second light-emitting device are different in thickness, so that the color cast of the first area and the color cast of the second area are in the same color system.

Description

Technical Field

[0001] The present invention relates to the technical field of display product manufacturing, and particularly to a tiled display screen and a tiled display module. Background Art

[0002] At present, Organic Electroluminescent Display (OLED) has been applied to multiple fields such as mobile phones, televisions, and vehicle-mounted displays due to its excellent performance such as high color saturation, wide viewing angle, thin thickness, and flexible bending. In the future, for the display of rich requirements, more and more OLED tiling is also needed for large screens in large conferences, cinemas, etc.; however, the color deviation problem of OLED screens causes color differences in the pictures of different regions, affecting the display perception. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides a tiled display screen and a tiled display module.

[0004] To achieve the above object, the technical solution adopted in the embodiment of the present invention is: a tiled display screen, including a display body, the display body includes a plurality of display panels arranged in an array and tiled, in the horizontal line-of-sight direction, the display body includes a first area and a second area with different viewing angles, the first area includes at least one first display panel, the second area includes at least one second display panel, the first display panel includes a first light-emitting device, and the second display panel includes a second light-emitting device;

[0005] The first light-emitting device and the second light-emitting device have different thicknesses, so that the color deviation of the first area and the second area is in the same color system.

[0006] Optionally, both the first light-emitting device and the second light-emitting device include a plurality of film layer structures stacked in sequence, the plurality of film layer structures of the first light-emitting device are first film layer structures, the plurality of film layer structures of the second light-emitting device are second film layer structures, and the thicknesses of at least one film layer structure in the first film layer structure and at least one same film layer structure in the second film layer structure are different.

[0007] Optionally, the viewing angle of the first area is smaller than the viewing angle of the second area, the plurality of film layer structures include a hole transport layer, and the thickness of the hole transport layer in the first film layer structure is smaller than the thickness of the hole transport layer in the second film layer structure.

[0008] Optionally, the viewing angle of the first region is 15 - 45 degrees, the viewing angle of the second region is 45 - 60 degrees, the thickness of the hole transport layer in the first film layer structure is 280 - 290 Å, and the thickness of the hole transport layer in the second film layer structure is 300 - 310 Å.

[0009] Optionally, the viewing angle of the first region is less than that of the second region. The plurality of film layer structures include a light extraction layer, and the thickness of the light extraction layer in the first film layer structure is less than that in the second film layer structure.

[0010] Optionally, the viewing angle of the first region is 15 - 45 degrees, the viewing angle of the second region is 45 - 60 degrees, the thickness of the light extraction layer in the first film layer structure is 690 - 700 Å, and the thickness of the light extraction layer in the second film layer structure is 790 - 800 Å.

[0011] Optionally, the viewing angle of the first region is less than that of the second region. The plurality of film layer structures include a cathode layer, and the cathode layer in the same display panel is an integral structure. The thickness of the cathode layer in the first film layer structure is less than that in the second film layer structure.

[0012] Optionally, the thickness of the cathode layer in the first film layer structure is 130 - 140 Å, and the thickness of the cathode layer in the second film layer structure is 160 - 170 Å.

[0013] Optionally, each display panel includes a plurality of the light-emitting devices. Each light-emitting device includes a cathode layer on the light-emitting side, and the thicknesses of the cathode layers in the light-emitting devices emitting different colors of light are different, so that the full-viewing angle color shift of the display panel is less than a preset value.

[0014] Optionally, the preset value is 2 JNCD.

[0015] Optionally, the plurality of light-emitting devices include a red light-emitting device capable of emitting red light, a green light-emitting device capable of emitting green light, and a blue light-emitting device capable of emitting blue light. The thickness of the cathode layer in the blue light-emitting device is less than that in the red light-emitting device, and the thickness of the cathode layer in the red light-emitting device is less than that in the green light-emitting device.

[0016] Optionally, the display body further includes a third region, and the third region includes at least one third display panel. The third region includes at least one third display panel, and the third display panel includes a third light-emitting device;

[0017] In the horizontal line of sight direction, the first regions are respectively arranged on the opposite sides of the third region, and the second regions are arranged on the sides of each first region away from the third region;

[0018] The viewing angle of the third region is smaller than that of the first region. The third light-emitting device includes a plurality of film layer structures of the same type as the first light-emitting device. The plurality of film layer structures of the third light-emitting device are the third film layer structures. The thickness of at least one film layer structure in the first film layer structure is smaller than the thickness of at least one same film layer structure in the second film layer structure, and the thickness of at least one film layer structure in the third film layer structure is smaller than the thickness of at least one same film layer structure in the first film layer structure.

[0019] Optionally, the viewing angle of the third region is 0-15 degrees, the viewing angle of the first region is 15-45 degrees, the viewing angle of the second region is 45-60 degrees, the thickness of the hole transport layer in the third film layer structure is 260-270 Å, the thickness of the hole transport layer in the first film layer structure is 280-290 Å, and the thickness of the hole transport layer in the second film layer structure is 300-310 Å.

[0020] Optionally, the viewing angle of the third region is 0-15 degrees, the viewing angle of the first region is 15-45 degrees, the viewing angle of the second region is 45-60 degrees, the thickness of the light extraction layer in the third film layer structure is 590-600 Å, the thickness of the light extraction layer in the first film layer structure is 690-700 Å, and the thickness of the light extraction layer in the second film layer structure is 790-800 Å.

[0021] An embodiment of the present invention further provides a spliced display module, including the above-mentioned spliced display screen.

[0022] The beneficial effects of the present invention are as follows: The spliced display screen provided by the present invention includes a display main body. The display main body includes a plurality of display panels arranged in an array splicing manner. In the horizontal line of sight direction, the display main body includes a first region and a second region with different viewing angles. The thicknesses of the first light-emitting devices in the first region and the second light-emitting devices in the second region are set to different thicknesses, so that the color offsets in the first region and the second region are in the same color system, thereby improving the problem of different color offsets due to different viewing angles of the spliced display screen. Description of the Drawings

[0023] Figure 1 Schematic diagram showing the display state of the spliced display screen in the prior art;

[0024] Figure 2 Schematic diagram showing the display state of the spliced display screen in the embodiment of the present invention;

[0025] Figure 3 Schematic diagram of the color deviation locus in the third region;

[0026] Figure 4 Schematic diagram of the color deviation locus in the first region;

[0027] Figure 5 Schematic diagram of the color deviation locus in the second region;

[0028] Figure 6 Schematic diagram of the color deviation locus of the tiled display screen;

[0029] Figure 7 Schematic diagram of the color deviation locus of the tiled display screen;

[0030] Figure 8 Schematic diagram of the color deviation locus of the tiled display screen. Detailed implementation manners

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some but not all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0032] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the ordinary meanings understood by those of ordinary skill in the art to which the present disclosure pertains. The "first", "second" and similar terms used in the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a", "an" or "the" do not denote a quantity limitation, but mean that there is at least one. The terms such as "comprising" or "including" mean that the elements or items appearing before this term cover the elements or items listed after this term and their equivalents, without excluding other elements or items. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0033] In the embodiments of the present disclosure, features such as "parallel", "perpendicular", and "identical" used herein include the strictly defined features of "parallel", "perpendicular", "identical", etc., as well as cases with certain tolerances such as "substantially parallel", "substantially perpendicular", "substantially identical", etc. Considering measurements and tolerances associated with the measurement of specific quantities (e.g., limitations of the measurement system), it means within the acceptable deviation range for a specific value determined by those of ordinary skill in the art. For example, "substantially" can mean within one or more standard deviations, or within 3% or 5% of the value.

[0034] In addition, in this document, unless otherwise defined, the terms "substantially", "essentially", "about", and "approximately" are used to describe and explain small variations. When used in conjunction with an event or situation, these terms can cover the case where the event or situation occurs exactly, as well as the case where the event or situation occurs approximately. For example, when used in conjunction with a numerical value, these terms can include a variation range of less than or equal to 10% of the numerical value, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to ±3%, less than or equal to ±2%, less than or equal to ±1%, less than or equal to ±0.5%, less than or equal to ±0.1%, less than or equal to ±0.05%. The term "substantially coplanar" can mean that two surfaces are arranged along the same plane within a micron range, for example, arranged along the same plane within 40μm, 30μm, 20μm, 10μm, or 1μm.

[0035] This embodiment provides a tiled display screen, including a display main body, the display main body includes a plurality of display panels arranged in an array and tiled, in the horizontal line-of-sight direction (referring to Figure 2 the X direction), the display main body includes a first region and a second region with different viewing angles, the first region includes at least one first display panel, the second region includes at least one second display panel, the first display panel includes a first light-emitting device, and the second display panel includes a second light-emitting device;

[0036] The thicknesses of the first light-emitting device and the second light-emitting device are different so that the color shifts of the first region and the second region are within the same color system.

[0037] The spectrum of the top-emitting device is obtained by multiplying the intrinsic spectrum of the device and the microcavity gain spectrum, that is, EL = PL * Gcav; the thickness of the light-emitting device affects the microcavity gain spectrum; the thicker the light-emitting device, the slower the brightness of the RGB pixel decays with the viewing angle, and the thinner the light-emitting device, the faster the brightness of the RGB pixel decays with the viewing angle. Therefore, in order to improve the problem of uneven display of the spliced ​​display screen, in this embodiment, the thickness of the light-emitting devices in the corresponding display panel in the first area and the second area with different viewing angles are set differently, reducing the color deviation of the first area and the second area, and even making the color deviation of the first area and the second area with different viewing angles in the same color system, thereby improving the viewing effect.

[0038] It should be noted that the settings of the first area and the second area can be set according to actual needs, but for the color deviation problem of the spliced ​​display screen, the smaller the viewing angle, the smaller the color deviation, and the larger the viewing angle, the larger the color deviation. In some implementations, the color deviation problem at a large viewing angle is mainly improved. For example, the viewing angle of the first area can be 15-45 degrees, and the viewing angle of the second area can be 45-60 degrees. When the spliced ​​display screen in the traditional technology displays a white picture, the viewer in the area with a viewing angle of 0-15 degrees sees a white picture, while the viewer in the area with a viewing angle of 15-45 degrees actually sees a green picture, and the viewer in the area with a viewing angle of 45-60 degrees actually sees a yellow picture. In other words, as the viewing angle increases, the viewer will actually see different colors from white to green and then to yellow. Refer to Figure 1 In this embodiment, the display panels located in the first area and the second area are set differently, mainly by setting the thickness of the first light-emitting device located in the first area and the second light-emitting device located in the second area differently, so that the color shift of the first area and the second area with different viewing angles are in the same color system, for example, the color shift of the first area and the second area are adjusted to yellow or green, so that as the viewing angle increases, the viewer will only see the color display from white to yellow, or as the viewing angle increases, the viewer will only see the color display from white to cyan, without excessive color switching, thereby improving the problem of uneven color shift and enhancing the viewing effect. Figure 2 The display screen in area A is white and cyan, and the display screens in areas B and C are both cyan.

[0039] It should be noted that Figure 1 and Figure 2Regions A, B, and C are all divided according to the viewing angle range. Each region is within a certain viewing angle range, and the viewing angle range of each region can be set according to actual needs. For example, the viewing angle range of Region A can be 0 - 30 degrees. At this time, the displayed image within the viewing angle range of 0 - 20 degrees closer to the center point is white, while the displayed image within the viewing angle range of 20 - 30 degrees is cyan. In this embodiment, in order to improve color deviation, in the horizontal line of sight direction (refer to Figure 2 in the X direction), the display body is divided into multiple regions with different viewing angles, reducing the color deviation of multiple regions and improving the problem of uneven color deviation. As the viewing angle increases, the color deviation becomes more serious. Generally, the color deviation at the center position is within the allowable range. For example, when displaying a white image, the displayed image in the region with a viewing angle within 0 - 20 degrees is white, while the color of the region with a viewing angle greater than 20 degrees shows other colors than white due to color deviation. Figure 1 and Figure 2 In, Region A includes two columns of white images at the center position and two columns of cyan images close to the white images. However, Figure 1 and Figure 2 are compared. By improving the color deviation of Regions B and C, the displayed images of Regions B and C become cyan, improving the problem of color deviation uniformity.

[0040] The multiple display panels included in the spliced display screen are OLED display panels. The OLED display panel includes a stacked driving circuit layer and multiple light-emitting devices. The light-emitting devices include multiple film layer structures arranged in a stacked manner. The multiple film layer structures may include an anode, a light-emitting functional layer, and a cathode stacked in sequence away from the driving circuit layer. The driving circuit layer includes a pixel driving circuit connected to the anode of each light-emitting device. The pixel driving circuit is used to drive the corresponding light-emitting device to emit light, thereby realizing the display of the OLED display panel. The light-emitting functional layer may include a hole transport layer, a light-emitting layer, and an electron transport layer stacked in sequence. Under the action of an electric field, the holes generated by the anode and the electrons generated by the cathode will move, be injected into the hole transport layer and the electron transport layer respectively, and migrate to the light-emitting layer. When the holes generated by the anode and the electrons generated by the cathode meet in the light-emitting layer, energy excitons are generated, thereby exciting the light-emitting molecules to finally generate visible light. By adjusting the thickness of at least one of the multiple film layer structures, the overall thickness of the corresponding light-emitting device can be adjusted.

[0041] In an exemplary embodiment, the first light-emitting device and the second light-emitting device both include multiple film layer structures arranged in a stacked manner. The multiple film layer structures of the first light-emitting device are the first film layer structures, and the multiple film layer structures of the second light-emitting device are the second film layer structures. The thickness of at least one of the film layer structures in the first film layer structures is different from the thickness of at least one of the same film layer structures in the second film layer structures.

[0042] It should be noted that although adjusting the thicknesses of different film layer structures can all adjust the thicknesses of the corresponding light-emitting devices, the effects on the color shift of different viewing angles of the display panel are different. When improving the color shift problem of the tiled display screen, the types and numbers of the film layers adjusted in the first film layer structure can be the same as or different from those of the film layers adjusted in the first film layer structure, or the types and numbers of the film layers adjusted in the first film layer structure are partially the same as those of the film layers adjusted in the second film layer structure, as long as the problem of improving the color shift in the first region and the relatively large color deviation value in the second region can be achieved. In some embodiments, in order to reduce variables, facilitate the setting of the first film layer structure and the second film layer structure, and reduce the adjustment difficulty, the thicknesses of at least one film layer structure in the first film layer structure and at least one same film layer structure in the second film layer structure are different. That is, thickness differential adjustment settings are made for the same types of film layers in the first film layer structure and the second film layer structure. For example, the thickness of a film layer in the first film layer structure and the second film layer structure is adjusted, and differential settings are made for the thicknesses of the hole transport layer in the first film layer structure and the hole transport layer in the second film layer structure.

[0043] In an exemplary embodiment, the viewing angle of the first region is smaller than that of the second region, and the plurality of film layer structures include a hole transport layer, and the thickness of the hole transport layer in the first film layer structure is smaller than the thickness of the hole transport layer in the second film layer structure.

[0044] The thicknesses of film layers such as the hole transport layer (HTL), the thicknesses and reflectivities of the cathode layer and the anode layer, and the thickness of the light extraction layer (CPL) will all affect the microcavity gain spectrum; the thicker the thickness of the HTL, the slower the attenuation of the RGB brightness with the viewing angle, and the thinner the HTL, the faster the attenuation of the RGB brightness with the viewing angle; however, the influence degree of the thickness of the HTL on RGB is not completely consistent. It is found through experiments that the thicker the HTL, the greener the large viewing angle, and the thinner the HTL, the yellower the large viewing angle. Therefore, differentiating the HTL helps to improve the color shift problem of the tiled screen. In this embodiment, the thickness of the hole transport layer in the first film layer structure is smaller than the thickness of the hole transport layer in the second film layer structure. This makes the color shift colors in the first region and the second region in the same color system.

[0045] In an exemplary embodiment, the viewing angle of the first region is 15 - 45 degrees, the viewing angle of the second region is 45 - 60 degrees, the thickness of the hole transport layer in the first film layer structure is 280 - 290 Å, and the thickness of the hole transport layer in the second film layer structure is 300 - 310 Å.

[0046] By adopting the above solution, the color shift colors of the first region and the second region can both be cyan, thereby improving the problem of uneven display at different viewing angles. Figure 4 The green dot 102 in it is the color shift color of the first region. Figure 5 The green dot 103 in it is the color shift color of the second region. It can be seen that the colors displayed in the first region and the second region are both cyan.

[0047]

[0048] The above table shows the color shift test results of the tiled display screen. Among them, the viewing angle of the first region is 15 - 45 degrees, the viewing angle of the second region is 45 - 60 degrees, the thickness of the hole transport layer in the first film layer structure is 280 - 290 Å, and the thickness of the hole transport layer in the second film layer structure is 300 - 310 Å. From the above table, it can be seen that after the thicknesses of the hole transport layer in the first film layer structure and the hole transport layer in the second film layer structure are differentially set, compared with the traditional technology, the color shift values of the first region and the second region both decrease, and the color shifts of the first region and the second region are in the same color system and both show cyan.

[0049] It should be noted that the hole transport layer is formed by evaporation. The differential setting of the thicknesses of the hole transport layer in the first film layer structure and the hole transport layer in the second film layer structure can be achieved by adjusting the evaporation rate and evaporation time. For example: in some embodiments, in the direction perpendicular to the light-emitting surface of the display screen, the length of the tiled display screen is 1330 Å. The evaporation time and evaporation rate of the hole transport layer in the first film layer structure and the second film layer structure can refer to the following table to form different thicknesses so as to make the color shift colors of the first region and the second region both cyan, but not limited thereto.

[0050]

[0051] In an exemplary embodiment, the viewing angle of the first region is smaller than that of the second region, and the multiple film layer structures include a light extraction layer. The thickness of the light extraction layer in the first film layer structure is smaller than that of the light extraction layer in the second film layer structure.

[0052] In an exemplary embodiment, the viewing angle of the first region is 15 - 45 degrees, the viewing angle of the second region is 45 - 60 degrees, the thickness of the light extraction layer in the first film layer structure is 690 - 700 Å, and the thickness of the light extraction layer in the second film layer structure is 790 - 800 Å.

[0053] Reference Figure 6, the thickness of the light extraction layer corresponding to the black color deviation locus line is 700 Å, and the green dots on the black color deviation locus line represent the color displayed in the first region. The thickness of the light extraction layer corresponding to the blue color deviation locus line is 800 Å, and the green dots on the blue color deviation locus line represent the color displayed in the second region. It can be seen that by setting the light extraction layer of the first region to 700 Å and the thickness of the light extraction layer of the second region to 800 Å, the colors displayed in the first region and the second region are in the same color system, both being cyan.

[0054] In an exemplary embodiment, the viewing angle of the first region is smaller than that of the second region. The plurality of film layer structures include a cathode layer, and the cathode layer in the same display panel is an integral structure. The thickness of the cathode layer in the first film layer structure is smaller than that of the cathode layer in the second film layer structure.

[0055] In an exemplary embodiment, the thickness of the cathode layer in the first film layer structure is 130 - 140 Å, and the thickness of the cathode layer in the second film layer structure is 160 - 170 Å.

[0056] Reference Figure 7 , the thickness of the cathode layer corresponding to the second color deviation locus line 1002 is 140 Å, and the green dots on the second color deviation locus line 1002 represent the color displayed in the first region. The thickness of the cathode layer corresponding to the third color deviation locus line 1003 is 170 Å, and the green dots on the third color deviation locus line 1003 represent the color displayed in the second region. It can be seen that by setting the thickness of the light extraction layer of the first region to 140 Å and the thickness of the light extraction layer of the second region to 170 Å, the colors displayed in the first region and the second region can be in the same color system, both being cyan.

[0057] In an exemplary embodiment, each display panel includes a plurality of the light-emitting devices. Each light-emitting device includes a cathode layer on the light-emitting side, and the thicknesses of the cathode layers in the light-emitting devices emitting different colors of light are different, so that the full-view color deviation of the display panel is less than a preset value.

[0058] In the traditional technology, the cathode layer in the OLED display panel is laid as a whole and is an integral structure. However, different thicknesses of the cathode layer will also have different effects on the light emitted by the light-emitting devices emitting different colors of light. For example, the color deviation of the light-emitting device emitting green light is the least affected, and the color deviation of the light-emitting device emitting blue light is the least affected. In view of this phenomenon, the thicknesses of the cathode layers in the light-emitting devices emitting different colors of light can be set differently to adjust the full-view color deviation of the display panel, and further adjust the full-view color deviation of the tiled display screen.

[0059] In an exemplary embodiment, the preset value is 2 JNCD.

[0060] In an exemplary embodiment, the plurality of light-emitting devices include a red light-emitting device capable of emitting red light, a green light-emitting device capable of emitting green light, and a blue light-emitting device capable of emitting blue light. The thickness of the cathode layer in the blue light-emitting device is less than the thickness of the cathode layer in the red light-emitting device, and the thickness of the cathode layer in the red light-emitting device is less than the thickness of the cathode layer in the green light-emitting device.

[0061] Reference Figure 8 , the color shift locus line 200 is such that the thickness of the cathode layer in the blue light-emitting device is less than the thickness of the cathode layer in the red light-emitting device. The color coordinates represented by the purple dashed circle are 3.0 JNCD, the color coordinates marked by the green dashed circle are 4.5 JNCD, and the color coordinates represented by the red dashed circle are 5.2 JNCD. When the thickness of the cathode layer in the red light-emitting device is less than the thickness of the cathode layer in the green light-emitting device, the color shift locus of the spliced display screen is visible. The color shift values in the first region and the second region are both less than 2 JNCD, and the colors displayed in the first region and the second region are also in the same color system.

[0062] In an exemplary embodiment, the display body further includes a third region (reference Figure 1 and Figure 2 the A area in), the third region includes at least one third display panel, the third region includes at least one third display panel, and the third display panel includes a third light-emitting device;

[0063] In the horizontal line-of-sight direction (reference Figure 1 and Figure 2 the X direction in), the first regions are respectively disposed on opposite sides of the third region, and the second region is disposed on one side of each first region away from the third region;

[0064] The viewing angle of the third region is less than the viewing angle of the first region. The third light-emitting device includes a plurality of film layer structures of the same type as the first light-emitting device. The plurality of film layer structures of the third light-emitting device are third film layer structures. The thickness of at least one film layer structure in the first film layer structure is less than the thickness of at least one same film layer structure in the second film layer structure, and the thickness of at least one film layer structure in the third film layer structure is less than the thickness of at least one same film layer structure in the first film layer structure.

[0065] In an exemplary embodiment, the viewing angle of the third region is 0 - 15 degrees, the viewing angle of the first region is 15 - 45 degrees, the viewing angle of the second region is 45 - 60 degrees, the thickness of the hole transport layer in the third film layer structure is 260 - 270 Å, the thickness of the hole transport layer in the first film layer structure is 280 - 290 Å, and the thickness of the hole transport layer in the second film layer structure is 300 - 310 Å.

[0066] Table 1

[0067]

[0068] Table 2

[0069] Area A Area B Area C Region length 1330A 1330A 1330A Evaporation time 120-130s 130-140s 140-150s Evaporation rate 10.2 - 10.5 A / s 9.5 - 9.9 A / s 8.9 - 9.2 A / s Evaporated film thickness 260-270A 280-290A 300-310A

[0070] The above Table 1 shows the comparison results of the color shift of different viewing angle regions between the traditional technical solution and the technical solution of this embodiment. The above Table 2 shows the evaporation rate, evaporation time, and evaporation film thickness of the hole transport layer in different regions. As can be seen from the above table, by differentially setting the thickness of the hole transport layer in the first region, the second region, and the third region with different viewing angles, the improvement of the large viewing angle color shift is achieved.

[0071] Figure 3 The green dot 101 in is the color of the color shift in the third region, Figure 4 The green dot 102 in is the color of the color shift in the first region, Figure 5 The green dot 103 in is the color of the color shift in the second region. It can be seen that the colors displayed in the first region and the second region are both cyan.

[0072] In an exemplary embodiment, the viewing angle of the third region is 0 - 15 degrees, the viewing angle of the first region is 15 - 45 degrees, the viewing angle of the second region is 45 - 60 degrees, the thickness of the light extraction layer in the third film layer structure is 590 - 600 Å, the thickness of the light extraction layer in the first film layer structure is 690 - 700 Å, and the thickness of the light extraction layer in the second film layer structure is 790 - 800 Å.

[0073] Reference Figure 6, the thickness of the light extraction layer corresponding to the black color deviation locus line is 700 Å. The green dots on the black color deviation locus line represent the color displayed in the first region. The thickness of the light extraction layer corresponding to the blue color deviation locus line is 800 Å. The green dots on the blue color deviation locus line represent the color displayed in the second region. The thickness of the light extraction layer corresponding to the red color deviation locus line is 600 Å. The green dots on the red color deviation locus line represent the color displayed in the third region. It can be seen that by setting the light extraction layer of the first region to 700 Å, the thickness of the light extraction layer of the second region to 800 Å, and the light extraction layer of the third region to 600 Å, the color deviation of the tiled display screen is improved. The colors displayed in the first region and the second region are in the same color system and are both cyan.

[0074] In an exemplary embodiment, the viewing angle of the third region is 0 - 15 degrees, the viewing angle of the first region is 15 - 45 degrees, the viewing angle of the second region is 45 - 60 degrees. The thickness of the cathode layer of the third film layer structure is 100 - 110 Å, the thickness of the cathode layer in the first film layer structure is 140 - 150 Å, and the thickness of the light extraction layer in the second film layer structure is 170 - 180 Å.

[0075] Reference Figure 7 , the thickness of the cathode layer corresponding to the first color deviation locus line 1001 is 100 Å. The green dots on the first color deviation locus line 1001 represent the color displayed in the third region. The thickness of the cathode layer corresponding to the second color deviation locus line 1002 is 140 Å. The green dots on the second color deviation locus line 1002 represent the color displayed in the first region. The thickness of the cathode layer corresponding to the third color deviation locus line 1003 is 170 Å. The green dots on the third color deviation locus line 1003 represent the color displayed in the second region. It can be seen that by setting the thickness of the light extraction layer of the first region to 140 Å and the thickness of the light extraction layer of the second region to 170 Å, the color deviation of the tiled display screen can be improved. The color deviation value of the third region is less than 3 JNCD. The colors displayed in the first region and the second region are in the same color system and are both cyan.

[0076] An embodiment of the present invention further provides a tiled display module, including the above-mentioned tiled display screen.

[0077] An embodiment of the present invention further provides a display device, including the above-mentioned splicing display module. The display device includes, but is not limited to, components such as a radio frequency unit, a network module, an audio output unit, an input unit, a sensor, a display unit, a user input unit, an interface unit, a memory, a processor, and a power supply. Those skilled in the art can understand that the structure of the above display device does not limit the display device. The display device may include more or fewer of the above components, or combine certain components, or have different component arrangements. In the embodiment of the present invention, the display device includes, but is not limited to, a display, a mobile phone, a tablet computer, a television, a wearable electronic device, a navigation display device, etc.

[0078] The following points need to be explained:

[0079] (1) The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can refer to the general design.

[0080] (2) For clarity, in the drawings used to describe the embodiments of the present disclosure, the thickness of layers or regions is enlarged or reduced, that is, these drawings are not drawn according to the actual scale. It can be understood that when an element such as a layer, a film, a region, or a substrate is referred to as being "on" or "under" another element, the element can be "directly" on or under the other element or there can be an intermediate element.

[0081] (3) Without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0082] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present invention. However, the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims

1. A spliced display screen, characterized in that, It includes a display body, the display body includes a plurality of display panels arranged in an array splicing manner. In the horizontal line-of-sight direction, the display body includes a first area and a second area with different viewing angles. The first area includes at least one first display panel, the second area includes at least one second display panel, the first display panel includes a first light-emitting device, and the second display panel includes a second light-emitting device; The thicknesses of the first light-emitting device and the second light-emitting device are different, so that the color shift of the first area and the second area is in the same color system.

2. The spliced display screen according to claim 1, characterized in that, Both the first light-emitting device and the second light-emitting device include a plurality of film layer structures stacked in sequence. The plurality of film layer structures of the first light-emitting device are first film layer structures, the plurality of film layer structures of the second light-emitting device are second film layer structures, and the thicknesses of at least one film layer structure in the first film layer structure and at least one same film layer structure in the second film layer structure are different.

3. The spliced display screen according to claim 2, wherein The viewing angle of the first area is smaller than that of the second area. The plurality of film layer structures include a hole transport layer, and the thickness of the hole transport layer in the first film layer structure is smaller than that of the hole transport layer in the second film layer structure.

4. The spliced display screen according to claim 3, wherein, The viewing angle of the first area is 15 - 45 degrees, the viewing angle of the second area is 45 - 60 degrees, the thickness of the hole transport layer in the first film layer structure is 280 - 290 Å, and the thickness of the hole transport layer in the second film layer structure is 300 - 310 Å.

5. The spliced display screen according to claim 2, wherein The viewing angle of the first area is smaller than that of the second area. The plurality of film layer structures include a light extraction layer, and the thickness of the light extraction layer in the first film layer structure is smaller than that of the light extraction layer in the second film layer structure.

6. The spliced display screen according to claim 5, wherein The viewing angle of the first area is 15 - 45 degrees, the viewing angle of the second area is 45 - 60 degrees, the thickness of the light extraction layer in the first film layer structure is 690 - 700 Å, and the thickness of the light extraction layer in the second film layer structure is 790 - 800 Å.

7. The spliced display screen according to claim 2, wherein The viewing angle of the first area is smaller than that of the second area. The plurality of film layer structures include a cathode layer. The cathode layer in the same display panel is an integral structure, and the thickness of the cathode layer in the first film layer structure is smaller than that of the cathode layer in the second film layer structure; The thickness of the cathode layer in the first film layer structure is 130 - 140 Å, and the thickness of the cathode layer in the second film layer structure is 160 - 170 Å.

8. The spliced display screen according to claim 2, wherein Each display panel includes a plurality of the light-emitting devices. Each light-emitting device includes a cathode layer on the light-emitting side. The thicknesses of the cathode layers in the light-emitting devices that emit different colors of light are different, so that the full-view color shift of the display panel is less than a preset value; The preset value is 2 JNCD; The plurality of light-emitting devices include a red light-emitting device capable of emitting red light, a green light-emitting device capable of emitting green light, and a blue light-emitting device capable of emitting blue light. The thickness of the cathode layer in the blue light-emitting device is smaller than that of the cathode layer in the red light-emitting device, and the thickness of the cathode layer in the red light-emitting device is smaller than that of the cathode layer in the green light-emitting device.

9. The spliced display screen according to claim 4, wherein The display body further includes a third region, the third region includes at least one third display panel, the third region includes at least one third display panel, and the third display panel includes a third light-emitting device; In the horizontal line-of-sight direction, the first regions are respectively arranged on the opposite sides of the third region, and the second region is arranged on one side of each first region away from the third region; The viewing angle of the third region is smaller than that of the first region. The third light-emitting device includes a plurality of film layer structures of the same type as the first light-emitting device. The plurality of film layer structures of the third light-emitting device are third film layer structures. The thickness of at least one film layer structure in the first film layer structure is smaller than the thickness of at least one same film layer structure in the second film layer structure, and the thickness of at least one film layer structure in the third film layer structure is smaller than the thickness of at least one same film layer structure in the first film layer structure.

10. The spliced display screen according to claim 9, wherein, The viewing angle of the third region is 0-15 degrees, the viewing angle of the first region is 15-45 degrees, the viewing angle of the second region is 45-60 degrees. The thickness of the hole transport layer in the third film layer structure is 260-270 Å, the thickness of the hole transport layer in the first film layer structure is 280-290 Å, and the thickness of the hole transport layer in the second film layer structure is 300-310 Å.

11. The spliced display screen according to claim 9, wherein The viewing angle of the third region is 0-15 degrees, the viewing angle of the first region is 15-45 degrees, the viewing angle of the second region is 45-60 degrees. The thickness of the light extraction layer of the third film layer structure is 590-600 Å, the thickness of the light extraction layer in the first film layer structure is 690-700 Å, and the thickness of the light extraction layer in the second film layer structure is 790-800 Å.

12. A splicing display module, characterized in that, Including the spliced display screen according to any one of claims 1-11.

Images